865387152 has 160 divisors (see below), whose sum is σ = 2874696960. Its totient is φ = 247183488.

The previous prime is 865387111. The next prime is 865387163. The reversal of 865387152 is 251783568.

It is a super-2 number, since 2×865387152² = 1497789845693342208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 865387098 and 865387107.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 243178 + ... + 246710.

It is an arithmetic number, because the mean of its divisors is an integer number (17966856).

Almost surely, 2^865387152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 865387152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437348480).

865387152 is an abundant number, since it is smaller than the sum of its proper divisors (2009309808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

865387152 is an equidigital number, since it uses as much as digits as its factorization.

865387152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3569 (or 3545 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 865387152 is about 29417.4633848672. The cubic root of 865387152 is about 952.9500731196.

The spelling of 865387152 in words is "eight hundred sixty-five million, three hundred eighty-seven thousand, one hundred fifty-two".